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| author | Ilya Leoshkevich <[email protected]> | 2021-09-06 13:04:14 +0000 |
|---|---|---|
| committer | Vasily Gorbik <[email protected]> | 2021-09-16 08:39:55 +0000 |
| commit | db7bee653859ef7179be933e7d1384644f795f26 (patch) | |
| tree | 566fa68b630035ccc491a6aa3ce8fba3366ee31b /tools/perf/util/annotate.c | |
| parent | s390/bpf: Fix 64-bit subtraction of the -0x80000000 constant (diff) | |
| download | kernel-db7bee653859ef7179be933e7d1384644f795f26.tar.gz kernel-db7bee653859ef7179be933e7d1384644f795f26.zip | |
s390/bpf: Fix optimizing out zero-extensions
Currently the JIT completely removes things like `reg32 += 0`,
however, the BPF_ALU semantics requires the target register to be
zero-extended in such cases.
Fix by optimizing out only the arithmetic operation, but not the
subsequent zero-extension.
Reported-by: Johan Almbladh <[email protected]>
Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend")
Reviewed-by: Heiko Carstens <[email protected]>
Signed-off-by: Ilya Leoshkevich <[email protected]>
Signed-off-by: Vasily Gorbik <[email protected]>
Diffstat (limited to 'tools/perf/util/annotate.c')
0 files changed, 0 insertions, 0 deletions